package com.kiku.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;

import com.kiku.reggie.common.BaseContext;
import com.kiku.reggie.common.CustomException;
import com.kiku.reggie.entity.*;
import com.kiku.reggie.mapper.OrderMapper;
import com.kiku.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;



    //实现用户下单
    @Override
    @Transactional
    public void submit(Orders orders) {
        //获得当前用户的id
        Long userId = BaseContext.getCurrentId();
        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> shoppingCartLambdaQueryWrapper = new LambdaQueryWrapper<>();
        shoppingCartLambdaQueryWrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(shoppingCartLambdaQueryWrapper);
        if (shoppingCartList==null||shoppingCartList.size()==0){
            throw new CustomException("购物车为空，不能下单");
        }
        //查询用户数据
        User user = userService.getById(userId);
        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook==null){
            throw new CustomException("地址信息有误，不能下单");
        }
        ArrayList<OrderDetail> orderDetails = new ArrayList<>();
        AtomicInteger amount = new AtomicInteger(0);
        //设置订单号
        long orderId = IdWorker.getId();
        //计算下单的总金额并且完成orderDetails
        for (ShoppingCart shoppingCart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(shoppingCart.getNumber());
            orderDetail.setDishFlavor(shoppingCart.getDishFlavor());
            orderDetail.setDishId(shoppingCart.getDishId());
            orderDetail.setSetmealId(shoppingCart.getSetmealId());
            orderDetail.setName(shoppingCart.getName());
            orderDetail.setImage(shoppingCart.getImage());
            orderDetail.setAmount(shoppingCart.getAmount());
            amount.addAndGet(shoppingCart.getAmount().multiply(new BigDecimal(shoppingCart.getNumber())).intValue());
            orderDetails.add(orderDetail);
        }

        
        //向订单表插入数据

        orders.setNumber(String.valueOf(orderId));
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);//2为待派送
        orders.setAmount(new BigDecimal(amount.get()));
        orders.setUserId(userId);
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());//计算总的金额
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(addressBook.getDetail());
        this.save(orders);
        //向订单明细表插入数据
        orderDetailService.saveBatch(orderDetails);
        //清空购物车数据
        shoppingCartService.remove(shoppingCartLambdaQueryWrapper);
    }
}